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New ClassLoader to allow for inter-plugin communication

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By: Dinnerbone <dinnerbone@dinnerbone.com>
This commit is contained in:
Bukkit/Spigot 2011-01-11 20:36:38 +00:00
parent 0e16bbed64
commit 91007ea0be
2 changed files with 55 additions and 1 deletions
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13
paper-api/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
View file

@ -8,6 +8,8 @@ import java.io.InputStream;
import java.lang.reflect.Constructor; import java.lang.reflect.Constructor;
import java.net.URL; import java.net.URL;
import java.net.URLClassLoader; import java.net.URLClassLoader;
import java.util.HashMap;
import java.util.Map;
import java.util.jar.JarEntry; import java.util.jar.JarEntry;
import java.util.jar.JarFile; import java.util.jar.JarFile;
import java.util.regex.Pattern; import java.util.regex.Pattern;
@ -37,6 +39,7 @@ public final class JavaPluginLoader implements PluginLoader {
private final Pattern[] fileFilters = new Pattern[] { private final Pattern[] fileFilters = new Pattern[] {
Pattern.compile("\\.jar$"), Pattern.compile("\\.jar$"),
}; };
private final Map<String, Class<?>> classes = new HashMap<String, Class<?>>();
public JavaPluginLoader(Server instance) { public JavaPluginLoader(Server instance) {
server = instance; server = instance;
@ -67,7 +70,7 @@ public final class JavaPluginLoader implements PluginLoader {
} }
try { try {
ClassLoader loader = URLClassLoader.newInstance(new URL[]{file.toURI().toURL()}, getClass().getClassLoader()); ClassLoader loader = new PluginClassLoader(this, new URL[]{file.toURI().toURL()}, getClass().getClassLoader());
Class<?> jarClass = Class.forName(description.getMain(), true, loader); Class<?> jarClass = Class.forName(description.getMain(), true, loader);
Class<? extends JavaPlugin> plugin = jarClass.asSubclass(JavaPlugin.class); Class<? extends JavaPlugin> plugin = jarClass.asSubclass(JavaPlugin.class);
Constructor<? extends JavaPlugin> constructor = plugin.getConstructor(PluginLoader.class, Server.class, PluginDescriptionFile.class, File.class, ClassLoader.class); Constructor<? extends JavaPlugin> constructor = plugin.getConstructor(PluginLoader.class, Server.class, PluginDescriptionFile.class, File.class, ClassLoader.class);
@ -84,6 +87,14 @@ public final class JavaPluginLoader implements PluginLoader {
return fileFilters; return fileFilters;
} }
public Class<?> getClassByName(final String name) {
return classes.get(name);
}
public void setClass(final String name, final Class<?> clazz) {
classes.put(name, clazz);
}
public void callEvent(RegisteredListener registration, Event event) { public void callEvent(RegisteredListener registration, Event event) {
Listener listener = registration.getListener(); Listener listener = registration.getListener();

43
paper-api/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java Normal file
View file

@ -0,0 +1,43 @@
package org.bukkit.plugin.java;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.AccessController;
import java.util.HashMap;
import java.util.Map;
/**
* A ClassLoader for plugins, to allow shared classes across multiple plugins
*/
public class PluginClassLoader extends URLClassLoader {
private final JavaPluginLoader loader;
private final Map<String, Class<?>> classes = new HashMap<String, Class<?>>();
public PluginClassLoader(final JavaPluginLoader loader, final URL[] urls, final ClassLoader parent) {
super(urls, parent);
this.loader = loader;
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
Class<?> result = classes.get(name);
if (result == null) {
result = loader.getClassByName(name);
if (result == null) {
result = super.findClass(name);
if (result != null) {
loader.setClass(name, result);
}
}
classes.put(name, result);
}
return result;
}
}